FR2588346A1 - IMPROVED TENSIONER FOR CHAINS, BELTS AND THE LIKE - Google Patents

Abstract

PERFECTED TENSIONER FOR CHAINS, BELTS AND SIMILAR, CONSTITUTED BY A BODY-FRAME 1, MONOBLOC, WHICH PRESENTS A MAIN PART AND AN ELBOW ARM WHICH DEFINES A FLANGE HEAD 11 FOR FIXING THE ASSEMBLY ON A FIXED PLACE, THE TENSIONER PROPERLY SAID BEING MOUNTED IN THE MAIN PART WITHOUT THE POSSIBILITY OF ROTATION BETWEEN THEM.

Description

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  "PERFECT TENSIONER FOR CHAINS, BELTS AND THE LIKE"

  Known tensioners pose the following problems: a) they do not make it possible to obtain a continuous and uniform tension adjustment; b) their possibilities of choice of fixing (vertical, horizontal or angular) are limited; c) they are made with too many parts;

  d) the rotation of the tensioner body relative to the body-

  frame is not avoided without preventing its free axial movement; and other disadvantages which will be indicated later and which are

remedied by the invention.

  Figure 1 shows an elevational view of a ten-

  improved deur for chains, belts and the like, according to

  the invention, with all its elements and features.

  In this figure we have represented two partial sections-

  the, one of which, upper, shows the constitution of the head (20) and the other, lower, shows the conformations for mounting the corpstendeur (2) in the body-frame (1) and the spring

(5) self-moving.

  Figure 2 shows a corresponding profile view

the previous figure.

  Figure 3 shows a plan section, along

as shown in figure 1.

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  In this figure we have not represented the body-ten-

  deur (2), with the object of offering a clearer view, as well as the

  spring (5) which constitutes the self-displacement means.

  Figure 4 shows a plan section of the body-ten-

  deur (2), as shown in figure 1. In this figure we also omitted the spring (5)

  to make an interpretation clearer.

  The advanced tensioner for chains, belts and

  milaires, the subject of this invention, is essential-

  consisting of: - a body-frame (1) - a tensioning body (2) - a self-moving spring (5) - a unidirectional latch (4) The built-up body (1) is in one piece and has two zones forming angle between them: of which a main part (1) and

a bent arm.

  This bent arm defines / a flange head (11), pierced with

  tap holes (111). This head-flange (isl) is configured or-

  thogonal or substantially orthogonal with respect to the bent arm and forming an angle with respect to the main part (1), in order to be able to fix the assembly either vertically or horizontally or

either incline, on a fixed point.

  The main part has a cavity (12) - either

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  blind hole with a small hole - to accommodate the spring

  self-displacement (5) and guide the body (21) of the tensioner (2).

  This tensioner is composed of a rod body (21) and a

  head (20). The rod body (.21) has a hole inside

  housing (22) and outside the unidirectional notches

  (211). The head (20) is made up of two parts, one of which

  metallic base (20a) and the other in rubber (20b) taking

  press on the first. The friction of the cat or the court-

  roie to be adjusted takes place on this rubber head (20b), which

  can easily be replaced in case of wear.

  The unidirectional latch (4) has an inverted "L" cut, the wings (4a) and (4b) of which frame the part

  main (1); it is positioned in the main part

  the one-piece body (1) by means of a screw (3) and can have a certain clearance thanks to the spring (6) enclosing the body (31) of the screw (3) and striking on the head thereof. (30) and on

the latch (4).

  The position of the latch (4) in the body (1) is com-

  completed by housing the end of its wing (4b) vertically, in a housing (14) provided for this purpose in the body (1) - housing obtained between the body (1) and the crenell (13) forming a single piece

with the body-

  The end of the wing (4a) is designed with a chan-

  unidirectional brake (41) which engages in the notches

  directional (211) to allow the free movement of the body in one direction - ascending according to the figures - and prevent it

in the opposite direction.

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  To avoid relative rotation between the body-ten-

  deur (2) and the body-bAâi (1) a key set (23) is provided for the key housing (121). In the embodiment shown, the key notch (121) is provided in the interior wall of the housing (12) and the key (23) is included in the wall of the

  body-rod (21), but however they can also be reverse-

  placed without absolutely changing the essence of the model.

  With this design, the operation takes place as follows: a) the assembly is fixed on a fixed location by means of

  the flange head (11). The tensioning head (20) remains either horizontally

  the, either vertical or at an angle to the fixed support - not shown -; b) The chain, or the belt, is adjusted continuously, because the spring (5) pushes the tensioning body (2) - and in the event of wear, produced over time on the rubber head (20b) the latch (4) allows its rise by releasing the ramp (41) from its wing (4a) the unidirectional notches (211) of the rod body

  (21). In the opposite direction, the latch (4) does not leave

  -20cendre --l-e - corps-- (2 -) - coe which makes that the catne, or the belt, remains tense;

  c) the rotation (2) relative to the body (1) is empe-

  chée by the set of key (23) and key notch (121).

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Claims (3)

  - 1 - Advanced tensioner for chains, belts and the like   characterized by the fact that it is composed of a body-frame (1), mo-   nobloc, defining two zones which form an angle between them; including a main part and an arm bent relative to it; by the fact that this bent arm has a head-flange (11) for horizontal, vertical or angular fixing of the assembly on a fixed point, and by the fact that the main part comprises   conformations for mounting a clean tensioner body (2) -   ment said, with anti-rotation means between the latter and the body-frame and unidirectional self-displacement means - against the chain or the belt to be adjusted, so as to allow to obtain   uniform and continuous adjustment of the latter's tension.   - 2 - Improved tensioner for chains, belts and the like, according to claim 1, characterized in that said configuration for mounting the tensioner body in the body-frame is a cavity (12) either blind or pierced with a small hole, and by the fact that said anti-rotation means are constituted by a   set of keys (23) provided on the tensioner body and notch   vettes provided in the inner wall of the blind body cavity   built or vice versa; so as to avoid body rotation-   tensioner with respect to the body-frame, without preventing its free movement axial cement.   - 3 - Advanced tensioner for chains, belts and the like,   according to claims 1 and 2, characterized in that   the self-moving means consist of a spring (5) housed in the blind cavity (12) striking against the base wall thereof and on the tensioning body; a unidirectional latch (4) fixed on the body-frame with the possibility of a slight tilting and a number of unidirectional notches (211) provided in the tensioning body; so that this tensioning body pushes the chain or the belt to be adjusted by the action of the spring in one direction,   at the same time as the one-way latch blocks the return lontaire in the opposite direction.